?? nf_drv.c
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/*C**************************************************************************
* NAME: nf_drv.c
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE: snd1c-refd-nf-4_0_3
* REVISION: 1.6
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the NF driver routines for 2Kb page size NF and with 2
* parallel NF
*****************************************************************************/
/*_____ I N C L U D E S ____________________________________________________*/
#include "config.h" /* system configuration */
#include "board.h" /* board definition */
#include "nf_drv.h" /* nf 2k low driver definition*/
/*_____ M A C R O S ________________________________________________________*/
#ifndef NF_CAPACITY_AUTO_DETECT
#error NF_CAPACITY_AUTO_DETECT must be defined in board.h
#endif
#if NF_CONFIG != NF_2X_2KB
#error NF_CONFIG must be defined with NF_2X_2KB in config.h
#endif
#ifndef NF_FULL_CHIP_ERASE
#error NF_FULL_CHIP_ERASE must be set to TRUE or FALSE in config.h
#endif
#ifndef MEM_RESERVED_SIZE
#error MEM_RESERVED_SIZE must be defined in config.h
#endif
/*_____ D E F I N I T I O N ________________________________________________*/
/*_____ D E C L A R A T I O N ______________________________________________*/
extern xdata Byte volatile nf_data_even; /* Data */
extern xdata Byte nf_send_cmd_even; /* Command */
extern xdata Byte nf_send_add_even; /* Address */
extern xdata Byte volatile nf_data_odd; /* Data */
extern xdata Byte nf_send_cmd_odd; /* Command */
extern xdata Byte nf_send_add_odd; /* Address */
extern pdata Byte gl_buffer[]; /* global buffer of 256 bytes */
extern data Uint32 gl_ptr_mem; /* memory data pointer */
extern data Uint32 gl_address; /* general address variable */
extern data Uint32 nf_current_physical_sector_addr_even; /* give the address of the current sector */
extern data Uint32 nf_current_physical_sector_addr_odd; /* give the address of the current sector */
extern data Uint16 gl_cpt_page; /* internal page counter (byte access) */
extern data Byte gl_buf_free_idx ;
extern data Byte nf_gl_buf_idx;
extern data Byte nf_zone;
extern idata Uint16 nf_look_up_table_block; /* Look up table block address */
extern idata Byte nf_gl_buf_idx_max; /* maximum position index */
extern bdata bit nf_busy; /* general busy flag */
extern bdata bit nf_parity_bit;
extern xdata Uint32 nf_disk_size; /* Size of the disk in sector - 1 */
extern xdata Uint16 nf_block_to_be_deleted_even; /* address of block to be deleted */
extern xdata Uint16 nf_block_min; /* position of first block in the buffer */
extern xdata Uint16 nf_block_to_be_deleted_odd; /* address of block to be deleted */
extern xdata Uint16 nf_lut_block[NF_ZONE_MAX]; /* LUT address in block value */
extern xdata Uint16 nf_logical_block; /* Logical block value (0 < x <1023) */
extern xdata Uint16 nf_spare_block; /* Number of free block */
extern xdata t_lut nf_buf[NF_BUFFER_SIZE]; /* Buffer for write operation: contains physical block address */
extern xdata Byte nf_spare_block_number[NF_ZONE_MAX]; /* Number of free spare block in each zone */
extern xdata Byte nf_lut_index[NF_ZONE_MAX]; /* Index of the last valid LUT */
extern xdata t_free_blocks nf_buf_free[24]; /* free block buffer */
extern xdata Uint32 nf_reserved_space_start;
#if (NF_CAPACITY_AUTO_DETECT == TRUE) /* If autodetect capacity nand flash is active */
extern xdata Byte nf_zone_max; /* nf_zone_max definition */
extern xdata Byte nf_device_type; /* nf_device_type definition */
extern bdata bit NF_5_CYCLE_ADDRESS_BIT; /* NF_5_CYCLE_ADDRESS_BIT definition */
#endif
idata Uint16 nf_redundant_logical_block_value; /* Logical block value in the redundant area*/
/*F**************************************************************************
* NAME: nf_check_status
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
* NF status
*----------------------------------------------------------------------------
* PURPOSE:
* Check the status of the device after a program or an erase operation
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
* ram/xram:
* cycle:
* stack:
* code:
*****************************************************************************/
bit nf_check_status (void)
{
if (nf_parity_bit == NF_ODD)
{
Nf_wait_busy_odd();
Nf_send_command_odd(NF_READ_STATUS_CMD); /* Status Type Command */
if ( (Nf_rd_byte_odd() & 0x01) == 0x00)
{
return OK;
}
}
else
{
Nf_wait_busy_even();
Nf_send_command_even(NF_READ_STATUS_CMD); /* Status Type Command */
if ( (Nf_rd_byte_even() & 0x01) == 0x00)
{
return OK;
}
}
return KO;
}
/*F**************************************************************************
* NAME: nf_calc_logical_block
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Calculate the logical block value (used in spare data area)
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
* ram/xram:
* cycle:
* stack:
* code:
*****************************************************************************/
void nf_calc_logical_block (void)
{
volatile Byte dummy;
bdata bit parity_bit;
nf_redundant_logical_block_value = (nf_logical_block << 1) + 0x1000;
/* Parity bit calculation */
dummy = nf_redundant_logical_block_value;
parity_bit = P;
dummy = ((Byte*)&nf_redundant_logical_block_value)[0];
if (P) parity_bit = ~parity_bit;
if (parity_bit)
nf_redundant_logical_block_value++;
}
/*F**************************************************************************
* NAME: nf_update_spare_data
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Update the value of the logical block on the spare data area
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
* ram/xram:
* cycle:
* stack:
* code:
*****************************************************************************/
void nf_update_spare_data (void)
{
Byte temp;
if (nf_parity_bit == NF_ODD)
{
Nf_wr_byte_odd(0xFF); Nf_wr_byte_odd(0xFF);
Nf_wr_byte_odd(0xFF); Nf_wr_byte_odd(0xFF);
Nf_wr_byte_odd(0xFF); Nf_wr_byte_odd(0xFF);
Nf_wr_byte_odd(nf_redundant_logical_block_value >> 8);
Nf_wr_byte_odd(nf_redundant_logical_block_value );
Nf_wr_byte_odd(0xFF); Nf_wr_byte_odd(0xFF);
Nf_wr_byte_odd(0xFF);
Nf_wr_byte_odd(nf_redundant_logical_block_value >> 8 );
Nf_wr_byte_odd(nf_redundant_logical_block_value );
Nf_wr_byte_odd(0xFF); Nf_wr_byte_odd(0xFF);
Nf_wr_byte_odd(0xFF);
if (gl_cpt_page != 0)
{
temp = (gl_cpt_page) >> 9;
temp = (0x01) << temp;
temp = ~temp;
Nf_wr_byte_odd(temp);
}
else
{
Nf_wr_byte_odd(0xFF);
}
}
else
{
Nf_wr_byte_even(0xFF); Nf_wr_byte_even(0xFF);
Nf_wr_byte_even(0xFF); Nf_wr_byte_even(0xFF);
Nf_wr_byte_even(0xFF); Nf_wr_byte_even(0xFF);
Nf_wr_byte_even(nf_redundant_logical_block_value >> 8);
Nf_wr_byte_even(nf_redundant_logical_block_value );
Nf_wr_byte_even(0xFF); Nf_wr_byte_even(0xFF);
Nf_wr_byte_even(0xFF);
Nf_wr_byte_even(nf_redundant_logical_block_value >> 8 );
Nf_wr_byte_even(nf_redundant_logical_block_value );
Nf_wr_byte_even(0xFF); Nf_wr_byte_even(0xFF);
Nf_wr_byte_even(0xFF);
if (gl_cpt_page != 0)
{
temp = (gl_cpt_page) >> 9;
temp = (0x01) << temp;
temp = ~temp;
Nf_wr_byte_even(temp);
}
else
{
Nf_wr_byte_even(0xFF);
}
}
}
/*F**************************************************************************
* NAME: nf_init_spare
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Initialize logical value in redundant data when a block is opened for
* the first time and the sector inside the block is not 0.
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
* ram/xram:
* cycle:
* stack:
* code:
*****************************************************************************/
void nf_init_spare (void)
{
Byte j;
nf_parity_bit = NF_EVEN;
for (j = ((Byte*)&gl_ptr_mem)[3] & 0x7F; j != 0 ; j--)
{
if (nf_parity_bit == NF_ODD)
{
Nf_active_ODD();
Nf_wait_busy_odd();
Nf_write_open_spare_area_odd (nf_current_physical_sector_addr_odd, 0x00);
nf_update_spare_data (); /* update spare data */
Nf_send_command_odd (NF_PAGE_PROGRAM_CMD); /* send program command */
((Byte*)&nf_current_physical_sector_addr_odd)[3]++;
}
else
{
Nf_active_EVEN();
Nf_wait_busy_even();
Nf_write_open_spare_area_even (nf_current_physical_sector_addr_even, 0x00);
nf_update_spare_data ();
Nf_send_command_even (NF_PAGE_PROGRAM_CMD);
((Byte*)&nf_current_physical_sector_addr_even)[3]++;;
}
nf_parity_bit = ~nf_parity_bit;
}
}
/*F**************************************************************************
* NAME: nf_copy_block_head
*----------------------------------------------------------------------------
* PARAMS:
* block : physical block number
* nb_sector : number of sector to be copied
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Copy the first part of a block that is not modified during a write
* operation
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
* ram/xram:
* cycle:
* stack:
* code:
*****************************************************************************/
void nf_copy_block_head (void)
{
Byte j;
Uint32 address2;
nf_parity_bit = NF_EVEN;
gl_address = (Uint32)(nf_block_to_be_deleted_odd) << NF_SHIFT_SECTOR_BLOCK; /* address of the source physical block */
address2 = (Uint32)(nf_block_to_be_deleted_even) << NF_SHIFT_SECTOR_BLOCK; /* address of the source physical block */
for (j = (((Byte*)&gl_ptr_mem)[3] & 0x7F); j != 0; j--)
{
if (nf_parity_bit == NF_ODD)
{
Nf_active_ODD();
Nf_wait_busy_odd();
Nf_send_command_odd (NF_READ_CMD);
Nf_send_address_odd (0x00);
Nf_send_address_odd (0x00);
Nf_send_address_odd ( ((Byte*)&gl_address)[3] ); /* Row address Byte 0 */
Nf_send_address_odd ( ((Byte*)&gl_address)[2] ); /* Row address Byte 1 */
if (NF_5_CYCLE_ADDRESS_BIT) /* Size of nf >= 128Mbytes ? */
Nf_send_address_odd ( ((Byte*)&gl_address)[1] ); /* Row address Byte 2 */
Nf_send_command_odd (NF_COPY_BACK_CMD); /* Send copy back command */
Nf_wait_busy_odd();
Nf_send_command_odd (NF_RANDOM_DATA_INPUT_CMD);
Nf_send_address_odd (0x00);
Nf_send_address_odd (0x00);
Nf_send_address_odd ( ((Byte*)&nf_current_physical_sector_addr_odd)[3] ); /* Row address Byte 0 */
Nf_send_address_odd ( ((Byte*)&nf_current_physical_sector_addr_odd)[2] ); /* Row address Byte 1 */
if (NF_5_CYCLE_ADDRESS_BIT) /* Size of nf >= 128Mbytes? */
Nf_send_address_odd ( ((Byte*)&nf_current_physical_sector_addr_odd)[1] ); /* Row address Byte 2 */
Nf_send_command_odd(NF_RANDOM_DATA_INPUT_CMD);
Nf_send_address_odd(0x10);
Nf_send_address_odd(0x08);
Nf_wr_byte_odd(0xEF);/* set internal page counter to 2048 */
Nf_wr_byte_odd(0xFF);/* reset delete block marker */
Nf_send_command_odd (NF_PAGE_PROGRAM_CMD);
((Byte*)&nf_current_physical_sector_addr_odd)[3]++; /* increase addresses */
((Byte*)&gl_address)[3]++;
}
else
{
Nf_active_EVEN();
Nf_wait_busy_even();
Nf_send_command_even (NF_READ_CMD);
Nf_send_address_even (0x00);
Nf_send_address_even (0x00);
Nf_send_address_even ( ((Byte*)&address2)[3] ); /* Row address Byte 0 */
Nf_send_address_even ( ((Byte*)&address2)[2] ); /* Row address Byte 1 */
if (NF_5_CYCLE_ADDRESS_BIT) /* Size of nf >= 128Mbytes ? */
Nf_send_address_even ( ((Byte*)&address2)[1] ); /* Row address Byte 2 */
Nf_send_command_even (NF_COPY_BACK_CMD); /* Send copy back command */
Nf_wait_busy_even();
Nf_send_command_even (NF_RANDOM_DATA_INPUT_CMD);
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